docs: def set_modification_time(self, modification_time=True):
          """
          Add time to be written as last modification time
  
          When called after initialisation configure to use
          time of writing file
          """
          if (isinstance(modification_time, basestring) and
                  modification_time.lower() == 'write') or\
                  modification_time is True:
              self.modification_time = True
          else:
              self.modification_time = check_time(modification_time)